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Contents
# A restricting tag for fact resolution mechanisms. The tag must be true
# for the resolution mechanism to be suitable.
require 'facter/util/values'
class Facter::Util::Confine
attr_accessor :fact, :values
include Facter::Util::Values
# Add the restriction. Requires the fact name, an operator, and the value
# we're comparing to.
#
# @param fact [Symbol] Name of the fact
# @param values [Array] One or more values to match against.
# They can be any type that provides a === method.
# @param block [Proc] Alternatively a block can be supplied as a check. The fact
# value will be passed as the argument to the block. If the block returns
# true then the fact will be enabled, otherwise it will be disabled.
def initialize(fact = nil, *values, &block)
raise ArgumentError, "The fact name must be provided" unless fact or block_given?
if values.empty? and not block_given?
raise ArgumentError, "One or more values or a block must be provided"
end
@fact = fact
@values = values
@block = block
end
def to_s
return @block.to_s if @block
return "'%s' '%s'" % [@fact, @values.join(",")]
end
# Evaluate the fact, returning true or false.
# if we have a block paramter then we only evaluate that instead
def true?
if @block and not @fact then
begin
return !! @block.call
rescue StandardError => error
Facter.debug "Confine raised #{error.class} #{error}"
return false
end
end
unless fact = Facter[@fact]
Facter.debug "No fact for %s" % @fact
return false
end
value = convert(fact.value)
return false if value.nil?
if @block then
begin
return !! @block.call(value)
rescue StandardError => error
Facter.debug "Confine raised #{error.class} #{error}"
return false
end
end
return @values.any? do |v| convert(v) === value end
end
end
Version data entries
121 entries across 121 versions & 2 rubygems